Obviously Sheldon Brown was very dear to us and hopefully his web site will live on but Ken Kifer's website is also one of my favotites

http://www.kenkifer.com/bikepages/index.htm
 

Sadly Ken is no longer with us and I really hope his web page remains on the web

 Is there any way we can preserve these sites

mamos
 

I also like MTBR.com - they have a pretty good single speed community.

I also check out the following blog daily - www.fatcyclist.com

I tend to travel over to:

http://www.bikeforums.net/index.php

now and again.  They have a little bit of everything.